public override bool SameMeaningCS(Unifiable s, bool caseSensitive)
        {
            if (s is BestUnifiable)
            {
                return(s.SameMeaningCS(this, caseSensitive));
            }
            if (ReferenceEquals(this, s))
            {
                return(true);
            }
            bool null2 = ReferenceEquals(s, null);

            if (null2)
            {
                return(false);
            }
            if (caseSensitive)
            {
                if (str == s.AsString())
                {
                    return(true);
                }
                return(false);
            }
            if (ToUpper(str) == s.ToUpper())
            {
                return(true);
            }
            return(false);
        }